Temporary magnets are made of

Options

A. brass
B. lead
C. soil
D. soft iron

Explanation

### Step-by-Step Text Solution:

1. **Understanding Temporary Magnets**: Temporary magnets are materials that can become magnetized when exposed to a magnetic field but lose their magnetism quickly once the external magnetic field is removed.

2. **Materials Used for Temporary Magnets**: The question asks what materials are used to make temporary magnets. The options provided are Brass, Lead, Soil, and Soft Iron.

3. **Evaluating Each Option**:
- **Brass**: Brass is an alloy of copper and zinc and is not a magnetic material. Therefore, it is not suitable for making temporary magnets.
- **Lead**: Lead is a heavy metal that is not magnetic. Hence, it cannot be used to make temporary magnets.
- **Soil**: Soil is a mixture of organic and inorganic materials and does not possess magnetic properties. Thus, it is not used for temporary magnets.
- **Soft Iron**: Soft iron is a magnetic material known for its ability to be magnetized easily and for having low retentivity, meaning it loses its magnetism quickly when the external magnetic field is removed.

4. **Conclusion**: Based on the evaluation of the options, the correct answer is that temporary magnets are made of **Soft Iron**.

### Final Answer:
Temporary magnets are made of **Soft Iron**.

---